EP3888537A1 - Dispositif et procédé de mesure sans contact d'au moins un paramètre vital d'une personne - Google Patents

Dispositif et procédé de mesure sans contact d'au moins un paramètre vital d'une personne Download PDF

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Publication number
EP3888537A1
EP3888537A1 EP21165254.0A EP21165254A EP3888537A1 EP 3888537 A1 EP3888537 A1 EP 3888537A1 EP 21165254 A EP21165254 A EP 21165254A EP 3888537 A1 EP3888537 A1 EP 3888537A1
Authority
EP
European Patent Office
Prior art keywords
person
unit
radar
vital parameter
thermography
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21165254.0A
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German (de)
English (en)
Inventor
Urs Schneider
Oliver Mannuß
Marco Huber
Xi Chen
Fady Aziz
Alper YAMAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP3888537A1 publication Critical patent/EP3888537A1/fr
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
    • G01S7/415—Identification of targets based on measurements of movement associated with the target
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/01—Measuring temperature of body parts ; Diagnostic temperature sensing, e.g. for malignant or inflamed tissue
    • A61B5/015—By temperature mapping of body part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/0205—Simultaneously evaluating both cardiovascular conditions and different types of body conditions, e.g. heart and respiratory condition
    • A61B5/02055—Simultaneously evaluating both cardiovascular condition and temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02444—Details of sensor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves 
    • A61B5/0507—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves  using microwaves or terahertz waves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/103—Detecting, measuring or recording devices for testing the shape, pattern, colour, size or movement of the body or parts thereof, for diagnostic purposes
    • A61B5/11—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb
    • A61B5/113—Measuring movement of the entire body or parts thereof, e.g. head or hand tremor, mobility of a limb occurring during breathing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/86—Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
    • G01S13/867—Combination of radar systems with cameras
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/87—Combinations of radar systems, e.g. primary radar and secondary radar
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/67—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for remote operation
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00563—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys using personal physical data of the operator, e.g. finger prints, retinal images, voicepatterns
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H10/00—ICT specially adapted for the handling or processing of patient-related medical or healthcare data
    • G16H10/60—ICT specially adapted for the handling or processing of patient-related medical or healthcare data for patient-specific data, e.g. for electronic patient records

Definitions

  • the present application relates to a device for contactless measurement of at least one vital parameter of at least one person according to claim 1 and a method for contactless measurement of at least one vital parameter of at least one person according to claim 13.
  • thermometers For example, it is already known to use digital clinical thermometers to record the body temperature as a vital parameter of the person, with the body temperature being recorded, for example, on the forehead or in the ear of a person.
  • this requires personnel who, on the one hand, have to come into contact with a large number of people and are thus exposed to a potential danger and, on the other hand, also incur personnel costs.
  • thermal imaging cameras to approximately record the body temperature of people, for example at entrances to buildings or in airports, and, if necessary, to take measures if an elevated body temperature is detected.
  • the use of thermal imaging cameras enables contactless measurement of body temperature over a certain distance so that deployed personnel are not exposed to potential danger.
  • Such systems can also record a higher number of people over a period of time, which likewise requires fewer staff and avoids waiting times.
  • radar units for determining a position of an object or a person, in particular a distance of the person from the radar unit. The determination takes place in particular via frequency-modulated continuous wave radar measurements.
  • FMCW radar frequency modulated continuous wave radar
  • the transmission frequency is changed periodically over time. It is also already known that vital parameters of people can be recorded by means of radar measurements.
  • the recorded measurement result does not exactly reflect the actual vital parameter and that incorrect assessments of a person's state of health on the basis of the recorded vital parameters can thus occur.
  • the ambient conditions can also influence the measurement, so that overall, when a vital parameter is recorded, a measured value is actually recorded from a large number of superimpositions of different parameters. It can happen that people are not recognized despite a critical vital parameter and thus often unconsciously ensure the further spread of pathogens.
  • the device according to the invention for contactless measurement of at least one vital parameter is preferably designed to carry out the method according to the invention, in particular an advantageous embodiment thereof.
  • the method according to the invention for contactless measurement of at least one vital parameter is preferably designed to be carried out by means of a device according to the invention, in particular an advantageous embodiment thereof.
  • the device according to the invention for contactless measurement of at least one vital parameter of at least one person comprises at least one radar unit for recording at least one first vital parameter of the person, in particular a heart rate, a breathing rate and / or an amplitude of the chest movement, with the recording being carried out by means of radar measurements .
  • the device according to the invention further comprises at least one thermography unit, in particular for recording a further vital parameter of the person, for example the body temperature, whereby micro-body movements of the person can be recorded by means of the thermography unit, as well as an evaluation unit which works with the radar unit and the Thermography unit is operatively connected.
  • the evaluation unit of the device according to the invention is designed to correct the recorded first vital parameter as a function of the recorded micro-body movements.
  • the radar measurements are preferably frequency-modulated continuous wave radar measurements by means of a frequency-modulated continuous wave radar.
  • micro-body movements of the person are small movements of the person, in particular fluctuations in the area of the upper body of the person, especially when the person is actually standing in one place at rest. These micro-body movements are movements of the person's body that do not necessarily perform them explicitly and often do not even perceive them themselves. In particular, there are unconscious fluctuations in the body with a low amplitude. The amplitude of such fluctuations is in particular in a range of less than 5 cm.
  • the person's vital parameters can in particular be the heart rate, respiratory rate or amplitude of the chest movement.
  • Other measurable and ascertainable vital parameters are also the body mass index, the lung function, for example to detect lung infections, or the oxygen saturation of the person.
  • the recorded first vital parameter which should in particular represent the heart rate, the breathing frequency and / or the amplitude of the movement, depending on the recorded micro-body movements of the person.
  • the recorded first vital parameter is based, without correction, on the actual movement of the person's chest and an overlay of the micro-body movements. Only through the correction can the measurement error be corrected by superimposing these movements, so that a more precise determination of the first vital parameter is made possible.
  • the micro-body movements are preferably recorded by analyzing several recordings of the person recorded by means of the thermography unit, which recordings were preferably recorded immediately one after the other, in particular at intervals of 0.8 m to 1.2 m. With the analysis of the recordings, a trajectory of the person can be recorded over a certain period of time. For the analysis, the recordings are determined in particular with regard to a change in an interpupillary distance and / or a change in a body surface, preferably the face area, and the micro-body movements are determined from the change or changes. In particular, the optical flow of movements of the person, which is given by the relative movement of the person to the thermography unit, is detected by means of the thermography unit.
  • the micro-body movements are taken into account for the micro-body movements, the axis being formed by a connecting line between the thermography unit and the person. Movement components of the person perpendicular to the axis are not taken into account from the determined trajectory of the person for the micro-body movements of the person in this case, since these can have a smaller influence on the detection of the vital parameter.
  • the micro-body movements flow into the determination of the first vital parameter as a compensation value, whereby a corresponding correction takes place.
  • the micro-body movements form an offset for the first vital parameter.
  • the device according to the invention allows an infection or at least the suspicion of an infection or another disease to be determined in the person without contact, whereby the health risk for everyone is minimized, especially in the case of very contagious infections.
  • the contactless measurement of vital parameters reduces the risk of infection and health, in particular for the operator of the device or corresponding security personnel, since they can maintain a corresponding distance from the person.
  • a contactless measurement with the present device enables a higher throughput of people per unit of time compared to a manual measurement through automatic recording of the vital parameters, which on the one hand can avoid accumulations in front of corresponding locations and at the same time also reduce the use of operators or security personnel.
  • the device also reduces the rubbish for the operators or security personnel caused by the necessary use of protective equipment.
  • a preferred embodiment is characterized in that the device has at least two radar units, which are preferably arranged essentially opposite one another in a direction of radiation of a radar radiation, in particular at the same level, or which are preferably next to one another and / or offset from one another, in particular on one side of the Device, are arranged.
  • the measurement of the first vital parameter can be further improved.
  • the two radar units can acquire the first vital parameter independently of one another, as a result of which the acquired vital parameter can be verified and the overall data quality can be increased.
  • an arrangement next to one another includes both an arrangement of the two radar units horizontally and vertically next to one another.
  • An arrangement of the at least two radar units offset from one another preferably comprises the radar units are arranged vertically, horizontally and / or radially offset from one another and in particular there is a certain distance between the individual radar units.
  • the second radar unit can preferably be used to determine the movement of the person's body.
  • the radar radiation from a first radar unit preferably has a first frequency and / or a first modulated signal and the radar radiation from a second radar unit has a second frequency and / or a second modulated signal.
  • the first frequency and / or the first modulated signal preferably differ from the second frequency and / or the second modulated signal.
  • Radar radiation from the at least two radar units with different frequencies and / or differently modulated signals makes it possible for each signal or each frequency to be recorded separately and thus for the first vital parameter to be recorded on the basis of separate data sets. In particular, by using different frequencies and / or modulated signals, incorrect detection of radar radiation from the first and / or second radar unit by the second and / or first radar unit can be avoided.
  • the frequency of the radar radiation is preferably in a range from 1 GHz to 90 GHz, in particular 24 GHz or 60 GHz.
  • the radar unit is also preferably designed on the basis of a SISO system with only one antenna on the transmitter side and only one receiver on the receiver side and / or on the basis of a MIMO system with several transmitters on the transmitter side and several receivers on the receiver side.
  • the radar unit is formed opposite a wall surface which at least partially, preferably completely, absorbs or diffusely scatters the radar radiation emitted by the radar unit.
  • a reflection of the radar radiation emitted by the radar unit on wall surfaces arranged behind the person in the direction of emission can be at least reduced or even completely prevented.
  • the radar measurement can be further improved, since the radar radiation is only reflected on the person himself and a further disruptive reflection can be prevented.
  • the detection of the first vital parameter can thus be further improved.
  • the person is preferably detected on the basis of the clutter method.
  • the horizontal or radial distance between the radar unit and / or the thermography unit and the person is 1 m to 3 m, preferably 1 m to 1.5 m, particularly preferably about 1 m enables optimal measurement of the first and possibly the further vital parameter and, on the other hand, also creates a distance to a possible operator of the device, so that he is not directly exposed to a health risk. An influencing or damage to these units can also be reduced or completely prevented by a distance between the radar unit and / or the thermography unit.
  • thermography unit is a thermal long-wave infrared camera.
  • the micro-body movements can be recorded particularly well with the thermal long-wave infrared camera.
  • this infrared camera is particularly suitable for recording the further vital parameter, in particular the person's body temperature.
  • the body temperature as a further vital parameter is preferably determined by means of the thermography unit in the face of the person, in particular between the eyes of the person.
  • the detection on the face, in particular between the eyes of the person provides a high level of accuracy for the measurement.
  • the measurement can also be carried out in the mouth area with the mouth open or in the ear. In particular, by measuring their body temperature, it can be used to determine whether the person has a fever, which is considered a sign of infection.
  • a calibration element in particular the thermography unit, is arranged opposite to calibrate the thermography unit. It is preferably the calibration element around a tempered blackbody. The calibration element calibrates the thermography unit at regular or irregular intervals, which reduces measurement errors and further improves the data quality of the recorded vital parameters.
  • a preferred embodiment is characterized in that the at least one radar unit is adjustable in height, in particular in such a way that it can be aligned with the person's chest.
  • the thermography unit is designed to be height-adjustable, in particular in such a way that it can be aligned with the face of the person.
  • the device preferably comprises a first display unit, which faces an operator of the device and is operatively connected to the evaluation unit in order to display at least the first vital parameter and in particular the further vital parameter and preferably further data on a display surface of the first display unit.
  • the operator of the device is able to intervene, for example if a certain limit value of the first vital parameter is exceeded, and the person with the increased vital parameter can be separated from the other persons, for example for more detailed examinations, segregate.
  • the first display unit can be arranged directly on the device or preferably at a distance from the device and from the person to be measured, so that the operator is at a correspondingly large distance from the person.
  • the device is preferably enclosed in a housing, as a result of which the device is protected from external environmental influences, for example rain, as well as from the effects of the person or third parties.
  • the radar unit is preferably sealed separately.
  • the device further comprises a lock space, into which the person enters for contactless detection of the at least one vital parameter.
  • the lock area can have an entry restriction as well as an exit restriction which, for example, only open when there is no longer any person in the lock area or the measurement of the at least one vital parameter was successful.
  • the lock space can in particular be a self-contained space with an entrance and an exit, which preferably has its own ventilation, for example via a fan.
  • the lock space can be designed in such a way that there are always constant ambient conditions.
  • the at least one radar unit and / or the at least one thermography unit can be arranged outside the lock space, directly on the lock space, in an element of the lock space or in the lock space itself.
  • a barrier in particular a fence, is arranged and / or at least one marking, in particular on the ground, is formed to position the person.
  • the barrier and / or at least one marking places the person at a distance from the radar unit and / or the thermography unit that is optimal for recording the vital parameters, so that precise recording of the at least one vital parameter and in particular the micro-body movements is made possible.
  • a temperature sensor for measuring the ambient temperature and / or a light sensor for measuring the light intensity of the person's surroundings is preferably arranged, the evaluation unit preferably being designed to convert the ambient temperature and / or the light intensity into the detection of the micro-body movements and in particular the further vital parameter to flow in by means of the thermography unit or to be linked to them.
  • the evaluation unit preferably being designed to convert the ambient temperature and / or the light intensity into the detection of the micro-body movements and in particular the further vital parameter to flow in by means of the thermography unit or to be linked to them.
  • thermography unit in particular the body temperature
  • the surface temperature of the person is first recorded by means of the thermography unit, which, however, can be lower in a cold environment than in a warm environment.
  • a preferred embodiment of the device is characterized in that the device is designed to record vital parameters of at least two people at the same time, which are preferably arranged next to one another at a distance of up to 1.5 m.
  • the distance between the people results in particular from the distance between the opposite shoulders of the people. Alternatively, the distance can also be seen as the distance between the middle of the body of the person.
  • a preferred embodiment of the device is characterized in that the evaluation unit is designed to correct the at least one recorded further vital parameter as a function of the radar measurements and / or to link it with the radar measurements, in particular for focusing the thermography unit.
  • the radar measurements can also be linked to the recorded data from the thermography unit, so that improved measurement accuracy, in particular by focusing the thermography unit, can be achieved .
  • the device preferably comprises a second display unit, the display surface of which faces the person and which is operatively connected to the evaluation unit.
  • the second display unit is a traffic light system.
  • the result of the detection of the at least one vital parameter can be displayed directly to the person using the second display unit.
  • the person can be shown immediately whether they can, for example, gain access to the facility or whether they have a vital parameter, which means that they must or should undergo further examinations. It is advisable not to display the directly recorded value of the vital parameter, in particular for reasons of simplified assignment and classification as well as for data protection reasons. Rather, it is preferable to undertake a categorization, for example in a traffic light system, which shows the person the result of the measurement in predefined categories. For example, it can be a traffic light system with the categories "Continue / Access" (traffic light on green), "Repetition of the measurement” (traffic light on orange) and "Access denied” (traffic light on red).
  • the device can also include access restriction devices, for example doors, barriers, or the like, which are operatively connected to the evaluation unit and, for example, only open when no critical state of health of the person has been detected.
  • access restriction devices for example doors, barriers, or the like, which are operatively connected to the evaluation unit and, for example, only open when no critical state of health of the person has been detected. This can be used in particular in facilities with increased security precautions such as airports or public facilities.
  • the evaluation unit comprises a database for a classification scheme for comparing the at least one vital parameter for determining and classifying a state of health of the person.
  • a classification scheme can be used to classify the recorded vital parameters and make it possible to make a decision about whether or not to pass through the device or to take measures such as medical examinations, isolation or quarantine.
  • the classification scheme can preferably be adapted to the respective use, for example in a hospital, at an airport or at an authority.
  • the device can preferably also be used in the field of sport, in order to determine the vital parameters of an athlete, in particular after completing a Training to determine.
  • a classification scheme tailored to this application can be provided.
  • the device can preferably also comprise a special classification scheme.
  • the evaluation unit preferably comprises a data interface which is designed to provide the recorded data for further processing and / or to receive further data.
  • a data interface enables the vital parameters recorded by the person to be forwarded to a doctor, for example in the context of a further examination, or to be made available to the local health authorities.
  • the recorded vital parameters can thus serve as a starting point for a further examination of the person.
  • the device further comprises a detection unit for detecting at least the identity of the person.
  • a detection unit for detecting at least the identity of the person.
  • This enables the at least one vital parameter to be clearly assigned to a person. Tracking is also facilitated by recording the identity and other data when determining critical vital parameters of a person, in particular tracking chains of infection.
  • the acquisition unit is preferably a camera and / or a scanner, by means of which in particular an identification document or a code, in particular a QR code, can be acquired.
  • An image of the person, in particular of the face can be recorded by a camera and, in particular, the recorded vital parameters can be assigned to the image.
  • the security precautions can preferably be further increased, for example when entering authorities or at airports.
  • the recorded vital parameters can be clearly assigned using the additional information in the identification document. A concealment of personal data can thus be prevented.
  • a comparison of the image present in the identification document with a captured image of a camera is also made possible for identification of the.
  • the recording of a code also makes it possible that the recorded vital parameters uniquely belong to a person can be assigned, whereby a degree of anonymization can be achieved through the use of a code.
  • the code is assigned to the person in advance by registering with certain personal data.
  • the data are preferably stored locally and / or transmitted to a central control center in order to enable people with critical vital parameters to be tracked.
  • thermography unit and / or the light sensor and / or the temperature sensor can be connected to the evaluation unit via a common interface.
  • the respective units and / or sensors are preferably supplied with power via the common interface.
  • the interface is a USB distributor.
  • the radar unit can preferably have a separate power supply, which provides a voltage of 5V and a current of 5A.
  • the aforementioned object is achieved by a method for determining at least one vital parameter of at least one person, with a radar unit at least one first vital parameter of the person, in particular a heart rate, a breathing rate and / or an amplitude of the chest movement, by means of radar measurements is captured. Furthermore, micro-body movements of the person and preferably at least one other vital parameter of the person, for example a body temperature, are recorded with at least one thermography unit, the at least one first vital parameter being corrected in an evaluation unit as a function of the recorded micro-body movements.
  • the radar measurements are preferably frequency-modulated continuous wave radar measurements by means of a frequency-modulated continuous wave radar.
  • a preferred embodiment of the method is characterized in that the at least one further vital parameter is corrected in the evaluation unit as a function of the radar measurements and / or linked to the radar measurements.
  • a distance between the person and the device can be determined via the radar measurement, wherein the distance recorded via the radar measurements can be used to focus the thermography unit for recording micro-body movements and in particular a further vital parameter.
  • thermography unit is preferably calibrated by means of a calibration element which is preferably arranged opposite the thermography unit.
  • the calibration element can be a temperature-controlled black body. Continuous calibration, which can take place at regular or irregular intervals, ensures that the micro-body movements recorded by the thermography unit and in particular the other vital parameters have a lower error tolerance.
  • thermography unit is preferably calibrated before each start-up of the device, with start-up taking place after each interruption in use of the device.
  • calibration can take place after a certain time interval has elapsed, for example after 60 minutes, or after a certain number of measurements.
  • an ambient temperature and / or a light intensity in the person's surroundings is incorporated into the detection of the micro-body movements and in particular the further vital parameter by means of the thermography unit or is linked to them.
  • the environmental conditions can be taken into account when recording the micro-body movements and, in particular, the further vital parameter, as a result of which the data quality can be improved and measurement errors can be reduced.
  • Even the environmental conditions can play a major role in the classification of the recorded vital parameters, for example when the ambient temperature is very warm or when the lock chamber is cooled by means of an air conditioning system.
  • the at least one vital parameter is preferably classified using a classification scheme stored in a database, which is stored in the evaluation unit, and a state of health of the person is determined and output. Due to the classification scheme, it is not necessarily the responsibility of an operator to decide whether the person is in a potentially critical state of health. Rather, the classification scheme can be based on a large number of results and measurements and a corresponding statistical evaluation and grouping of these data.
  • Another preferred embodiment of the method is characterized in that the at least one vital parameter is displayed to an operator on a display surface of a first display unit, so that the operator can intervene accordingly when a critical vital parameter is determined.
  • the person can be segregated for further medical examinations or to reduce the risk of infection.
  • information based on at least one recorded vital parameter is visualized on a display surface of a second display unit for the person.
  • the at least one recorded vital parameter can be displayed here.
  • visualization takes place on the basis of a traffic light system.
  • a direct result of the recorded vital parameter can be displayed to the person via the display area, for example that the person is allowed to enter the building, that the measurement is carried out again or that entry is denied.
  • the device preferably further comprises a device for contactless measurement of the oxygen saturation of the person and / or a device for creating a 3D scan of the person in order to obtain information about the person Body measurements and / or surface area, with the data or information thus determined preferably flowing into the evaluation unit.
  • the device preferably comprises at least one microphone for determining acoustic information, which preferably flows into the evaluation unit.
  • FIG. 1 shows a first embodiment of a device 1 according to the invention for contactless measurement of at least one vital parameter of at least one person 16.
  • the device 1 comprises a radar unit 2 and a thermography unit 3, which are arranged together on a stand.
  • the radar unit 2 detects a breathing rate as a first vital parameter of the person 16 by means of radar measurements, the radar measurements preferably being frequency-modulated continuous wave radar measurements.
  • the radar unit 2 and the thermography unit 3 are directed at a person 16 who is at a horizontal or radial distance 7 of approximately 1 m from the device 1.
  • thermography unit 3 which is designed as a long-wave infrared camera, on the one hand micro-body movements of the person 16 and on the other hand the body temperature as a further vital parameter of the person 16 are recorded.
  • the radar unit 2 of the device 1 is arranged in such a way that it is directed at the chest of the person 16.
  • the thermography unit 3 is directed essentially at the face of the person 16, in this case the area between the eyes of the person 16.
  • the area between the eyes of the person 16 enables the body temperature of the person 16 to be recorded as precisely as possible as a further vital parameter.
  • a shut-off element 14 in the form of a fence is arranged at a distance 7 from the radar unit 2 or the thermography unit 3.
  • the radar unit 2 as well as the thermography unit 3 are also connected to an evaluation unit 4.
  • the evaluation unit 4 the data or measurement results from the radar unit 2 and from the thermography unit 3 are combined and displayed to an operator of the device 1 on a first display surface 5a of a first display unit 5.
  • thermography unit 3 In addition to the further vital parameters in the form of the body temperature, the thermography unit 3 also records micro-body movements of the person 16, which mostly unconsciously executes these during the contactless measurement of the respiratory rate.
  • the micro-body movements are the smallest fluctuations in the body of the person 16 or movements of the head with minimal amplitude.
  • the evaluation unit 4 of the device 1 is designed to correct the respiratory rate as the recorded first vital parameter as a function of the recorded micro-body movements.
  • the breathing rate is determined via a movement of the person's 16 chest, which is superimposed by the micro-body movements of the person 16.
  • the one detected by the radar unit 2 The value of the breathing rate thus corresponds to a superposition on the one hand of the movement of the chest of the person 16, from which a breathing rate is determined, as well as the micro-body movements.
  • a potential health status of the person 16 can be derived on the basis of the respiratory rate and body temperature as vital parameters. If the recorded vital parameters are in a “normal range” of the classification scheme, the person 16 can pass the device 1 and thus gain access to the building, for example.
  • one or more vital parameters of the person 16 or a combination thereof are in a critical range according to the classification scheme, this is indicated to an operator of the device 1 on the display area 5a of the display unit 5.
  • the operator can thus take further measures.
  • the person 16 can, for example, be separated from the other people in order to minimize the risk of infection. There is also the possibility that the person 16 will have to undergo further medical examinations after critical vital parameters have been determined by the device 1.
  • the classification scheme includes body temperature, heart rate, breathing rate and the amplitude of the chest movement. If the body temperature exceeds a limit value, in the present case 37.5 ° C. or 38 ° C., and / or the heart rate exceeds a limit value, in the present case 90 or 100 beats per minute, a warning is issued to check for fever.
  • a warning is also issued with an indication of an examination for a lung disease.
  • a warning can be issued if the value falls below a limit value, in the present case less than 95%, alone or in combination with limit values for the aforementioned parameters.
  • the evaluation unit 4 also has a data interface via which data, such as an updated classification scheme, are received by the evaluation unit 4.
  • data such as an updated classification scheme
  • the data interface also enables the vital parameters of a person 16 to be provided and forwarded. Thus, if a critical vital parameter is determined, a doctor can access the recorded vital parameters during a further examination of the person 16, or they can be made available to him.
  • the device 1 can also comprise a second display unit 6, the display surface 6a of which faces the person 16.
  • the second display unit 6 is a traffic light with the traffic light colors green, orange and red (from bottom to top).
  • the result of the contactless measurement of the vital parameter can be visualized directly to the person 16 via the second display unit 6.
  • the color green means that the contactless measurement of the vital parameter shows no abnormalities and the person 16 is allowed to pass the device 1.
  • the device 1 detects a critical vital parameter, this can be signaled on the display area 6a of the display unit 6 by a red signal.
  • the person 16 should isolate himself from other people and be examined further without detours by a doctor in order to determine the state of health of the person 16 and a potential risk of infection directly.
  • an orange traffic light signal on the display surface 6a of the display unit 6 can indicate to the person 16 that the contactless measurement of vital parameters was not successful and is being carried out again.
  • An operator of the device 1 can monitor the contactless measurement of vital parameters of the person 16, but has a sufficient distance from the person 16 so that the risk of infection for the operator of the device 1 is reduced many times over compared to a manual measurement of a vital parameter of the person 16.
  • the device 1 can also have a housing 10, which protects the device 1 from direct sunlight, rain or the influence of third parties.
  • the housing 10 also allows the device 1 to be used outdoors and, if necessary, to be placed in front of corresponding buildings or entrances.
  • FIG. 2 a further embodiment of the device 1 according to the invention is shown, in which the person 16 enters a lock space 8, which has corresponding wall surfaces 9, for contactless measurement of the heart rate as a vital parameter.
  • the lock space 8 enables the contactless measurement of the at least one vital parameter to be carried out under almost constant conditions.
  • the lock space 8 enables the person 16 to be separated from other people during the measurement of the vital parameters, so that a contactless measurement of the vital parameter only takes place on the respective person 16 located in the lock space 8.
  • the lock space 8 has an entrance which only opens when there is no longer any person 16 present in the lock space 8 and this has possibly been appropriately disinfected or ventilated.
  • the exit from the lock space 8 opens analogously to the traffic light system as a second display unit 6, as in connection with Figure 1 explained, after the health status of the person 16 has been classified on the basis of the recorded vital parameters.
  • the device 1 shown further comprises two radar units 2, 2a, which are arranged on opposing wall surfaces 9 of the lock space 8 and are directed essentially at the chest and back of the person 16.
  • the arrangement of the radar units 2, 2a takes place in the same way Height above the floor of the lock space 8.
  • the lock space 8 is dimensioned such that the radar units 2, 2a each have a distance 7, 7a from the person 16 of approximately 1 m.
  • the wall surfaces 9 of the lock space 8 are designed in such a way that they absorb or diffusely scatter the radar radiation emitted by the radar units 2, 2a, so that measurement errors due to radar radiation reflected on the wall surfaces 9 are avoided.
  • the radar radiation of the first radar unit 2 generates radiation with a first frequency and a first modulated signal.
  • the second radar unit 2a has radar radiation with a second frequency that differs from the first frequency and which does not differ in modulation from the radar radiation of the first radar unit 2.
  • the radar radiation of the respective radar units 2, 2a can be differentiated, as a result of which the radar radiation can be recorded separately by the respective radar unit 2, 2a. This enables the first vital parameter to be recorded separately from one another by the radar units 2, 2a and a corresponding comparison of the recorded data.
  • thermography unit 3 for recording the micro-body movements and the body temperature of the person 16 is arranged in or on a wall surface 9 of the lock space 8.
  • a calibration element 18 for calibrating the thermography unit 3 is also arranged on the wall surface 9 opposite the thermography unit 3.
  • the calibration element 18 is a tempered black body which has a certain temperature. To calibrate the thermography unit 3, it is aimed at the calibration element 18 and the temperature measured with the thermography unit 3 is compared with the temperature of the temperature-controlled black body as the calibration element 18.
  • the thermography unit 3 is calibrated each time the device is started up, with start-up taking place after each lengthy interruption in use of the device.
  • a temperature sensor 11 is also arranged in the lock space 8 to detect the ambient temperature.
  • the ambient temperature also influences the measurement result of the thermography unit 3.
  • the ambient temperature flows via the temperature sensor 11 into that of the thermography unit 3 recorded micro-body movements or the body temperature as vital parameters or the recorded ambient temperature is linked with the data recorded by the thermography unit 3.
  • a light sensor 12 is also arranged in the lock space 8 for detecting the light intensity of the surroundings of the person 16, since the light intensity also influences the measurements of the thermography unit 3.
  • the measurements of the light sensor 12 for the light intensity therefore also flow into the data recorded by the thermography unit 3, such as micro-body movements or body temperature of the person 16, or are linked to these.
  • the lock space 8 includes active ventilation 17 via a fan.
  • Active ventilation 17 means that air is regularly exchanged in lock space 8, so that a potential risk of infection for person 16 from pathogens in the air is reduced to a minimum.
  • markings 15 are attached to the floor of the lock space 8, which are intended to guide the person 16 into the correct position.
  • An operator of the device 1 is located outside the lock space 8 and observes the contactless measurement of vital parameters. If the device 1 outputs a critical state of health of the person 16, the operator can intervene accordingly and isolate the person with the critical state of health from other people and, for example, accompany him to a direct examination by a doctor. If a critical state of health is determined, the person 16 can also be sent home immediately, for example under the condition that he is quarantined for a certain period of time.
  • the radar measurements of the radar unit 2, 2a enable not only the detection of the first vital parameter but also a determination of the distance 7, 7a of the person 16 from the radar unit 2, 2a.
  • the radar measurements are also linked to the measurements of the thermography unit 3.
  • the determination of the distance 7, 7a by means of the radar measurement by means of the radar unit 2, 2a enables the focus of the thermography unit 3 to be set.
  • FIG 3 a top view shows a further embodiment with the device 1 according to the invention, in which a contactless measurement of vital parameters with a device 1 is carried out at the same time for two people 16, 16a.
  • the device 1 again assigns as before Figure 1 executed, a radar unit 2, a thermography unit 3 and an evaluation unit 4, which are arranged in a housing 10.
  • the people 16, 16a stand at a distance 7, 7a of about 1.5 m from the device 1.
  • the distance 19 between the two people 16, 16a in the device 1 is also about 1.5 m, with the distance 19 relates to the distance between the opposite shoulders of persons 16, 16a.
  • the device 1 further comprises two second display units 6 in order to be able to display the result of the contactless measurement of the vital parameter of the respective person 16, 16a on the corresponding display surfaces 6a, which are designed as traffic lights.
  • the radar unit 2 and the thermography unit 3 are each designed in such a way that they can detect both persons 16, 16a and, due to the offset arrangement of the persons 16, 16a, can clearly assign the measurements.
  • the radar unit is designed on the basis of a MIMO system, each with several transmitters on the transmitter side and several receivers on the receiver side. For the correct positioning of the person 16, 16a in front of the radar unit 2 and the thermography unit 3, markings 15 are again formed on the floor.
  • the device 1 further comprises a detection unit 13, 13a for each of the two areas for contactless measurement of vital parameters, by means of which the identity of the respective person 16, 16a is detected.
  • the identification document of the person 16, 16a is scanned at the detection unit 13, 13a.
  • the detection unit 13, 13a is operatively connected to the evaluation unit 4, so that a recorded vital parameter clearly relates to the respective person 16, 16a can be assigned. This increases security, in particular when accessing security areas at an airport or at authorities.
  • a camera can be arranged in the device, via which the face of the person 16, 16a is recorded, which enables a comparison between the recorded data in the identification document, in particular the image, with a recorded image of the currently measured person 16, 16a .

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  • Health & Medical Sciences (AREA)
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  • Life Sciences & Earth Sciences (AREA)
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EP21165254.0A 2020-03-31 2021-03-26 Dispositif et procédé de mesure sans contact d'au moins un paramètre vital d'une personne Pending EP3888537A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143535A2 (fr) * 2006-06-01 2007-12-13 Biancamed Ltd. Appareil, système et procédé de surveillance de signaux physiologiques
KR20190071310A (ko) * 2017-12-14 2019-06-24 주식회사 허브테크 레이더 측정 거리를 이용한 열영상 체온 보정 시스템 및 방법
WO2019182355A1 (fr) * 2018-03-20 2019-09-26 주식회사 엠테이크 Téléphone intelligent, véhicule et caméra ayant un capteur d'image thermique, et procédé d'affichage et de détection l'utilisant
WO2020012455A1 (fr) * 2018-07-09 2020-01-16 Neteera Technologies Ltd. Système de sous-thz et thz destiné à la détection de paramètres physiologiques et procédé associé
WO2020128150A1 (fr) * 2018-12-18 2020-06-25 Teknologian Tutkimuskeskus Vtt Oy Fourniture d'unités d'image permettant la surveillance de signes vitaux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007143535A2 (fr) * 2006-06-01 2007-12-13 Biancamed Ltd. Appareil, système et procédé de surveillance de signaux physiologiques
KR20190071310A (ko) * 2017-12-14 2019-06-24 주식회사 허브테크 레이더 측정 거리를 이용한 열영상 체온 보정 시스템 및 방법
WO2019182355A1 (fr) * 2018-03-20 2019-09-26 주식회사 엠테이크 Téléphone intelligent, véhicule et caméra ayant un capteur d'image thermique, et procédé d'affichage et de détection l'utilisant
WO2020012455A1 (fr) * 2018-07-09 2020-01-16 Neteera Technologies Ltd. Système de sous-thz et thz destiné à la détection de paramètres physiologiques et procédé associé
WO2020128150A1 (fr) * 2018-12-18 2020-06-25 Teknologian Tutkimuskeskus Vtt Oy Fourniture d'unités d'image permettant la surveillance de signes vitaux

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
YU RONG ET AL: "Non-Contact Vital Signs Detection with UAV-Borne Radars", ARXIV.ORG, CORNELL UNIVERSITY LIBRARY, 201 OLIN LIBRARY CORNELL UNIVERSITY ITHACA, NY 14853, 27 November 2020 (2020-11-27), XP081824080 *

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